Polishing and grinding machine



Sept. 29, 1931. c, H wEs 1,825,455

POLISHING AND. GRINDING MACHINE Filed April 10, 1926 2 Sheets-Sheet 2 1/ 9 3% O O 5 2 lo I I /5 a 1 '1'. 1 5

52 I I l 23 j I fi J/ 2' 1111111 :1; x

I N VEN TOR.

(7244/? 0C. Hall/es.

ATTORNEY Patented Sept. 29, 1931 f oiinnmn F ASHT BULAQ onro i "immerse an] ama VMACHINE i Application-filed April 10, 1926. Serial No; 1', o9a

10 which readily allows of all movements necessary with the grinding element. A still-further object is the provision of work-holding means capable of ac'c'ommodatingobjects of various size and'shape. A'further object also is the provision of guiding meansfor controlling the direction of movement of the work-holders. Other objects willappear as the description proceeds. r v i a To the accomplishment of the foregoing and related ends, the invention, then, consists'of the means hereinafterfully described and particularly pointed out in theclaims, the annexed drawingsand, the following description setting forth in detail certain mechanism embodying the'invention, such disclosed means constituting, however, but several of the various'mecha'nical forms-in which the principleof the inventionmaybe used. u .x j' l In said. annexed drawings Fig. 1 is a front elevation of embodying my invention; Fig. 2 is a plan .view showing a counter-balancing arrangement without springs; Fig. 3 is an elevational detail on larger scale, of themountingshown in Fig. 2; Fig. 4 is an elevationah'detail showing further features of thework-holding means; and Fig. 5 isa detail in plan showing the relation of the guides therein,ithe central portionof the work holder being broken away to show thesubj acent structure.

In its general aspects, the machinecomprises -grinding or polishing elements. and work-holding means, these being supported on a base 1 of convenientor desired-form. The grinding or polishing wheels Qare carriedby spindles 3 which arealsoequipped with drive motors 4, the. spindles being mounted on levers-.5, or rather frames 6 on the levers. Each lever 5 .is'mounted on a shaft and in a manner" to :l7which may be driven in 'manner, for instance, by. an electric motor ':in the base of the machine. Placed uponthe traveling carrier in suitably spaced relation V are Work-holders 18 which in their preferred a machine .thei'ebelow in the vnect'ion: between the shoe and the chuck 18 "being had by aneck 20a through a slide 206 -mou'nted such as-to allow of limited'motion -in 'the radial slots 21 arranged about the 30 carried in the upper ends of supports 31 as at 32. Each grinding wheel assembly with its spindle and motor is'thus rockable prevent lateral tipping.

The frames 6 have shoes 7 for a purpose to be referreclto hereinafter, and the spindles are adjustable in the frames by virtue of the screw '8 with hand control wheel 9, springs 10 being interposed for the reverse take-up. (lounter-balancingmeans are provided for the grindingwheel assembly, such means including springs 11 extending from-a convenient lug 'onthe motor and grinding wheel assembly to brackets 12 attached to standards 33, an adjustment screw13 and hand wheel '14; being interposed for the regulation of tension as may be required. Along with the resilient or spring elements as counter-balancing means, or instead of such elements Where desired, I may also provide counter-' balancing weights 15, these beingcarried by arms 16 from the levers 5. Desirably the grinding wheel assembliesare arranged about .and above a traveling carrier, such carrier beingpreferably in the form ofa rotary table any convenient form are magnetically controlled and have -plain upper faces 19 for the reception ofobjects to be oper'atedupon by the grindingor polishing wheels. These work-holders may be mounted in fixed relation-on the traveling carrier if desired, but insome instances prefer to arrange the holders in a manner to control their direction of: movement while passing under the grinding or polishing wheels so as to maintain them in parallelism with such wheels. For the accomplishment of this, I mount the work-holders or magnetic i. chucks slidablyI and oscillably upon the traveling carrier, a projection being provided form of a. shoe 20, the conrotary table. Coacting with such projections or shoes are guides 22 which are supported in relation to the table on arms 34 rigidly connected to the base. Take-up tension springs 23 extend from a convenient point of attachment on the table, for instance, the lug 24, to the projection or shoe and serve to maintain the shoe in position subject to the controlling action of the guide 22.

Upon the travelling carrier 17 I also provide a control or cam means C for governing the path of the grinding elements as respects their up and down movement in contour; such cam means being shaped with the contour of the finished article it is desired to produce, and as will be seen, the shoe 7 in encountering such cam control,'will correspondingly take a path of motion in a vertical plane and control correspondingly the action of the grinding wheel upon the work carried by the .work-holder.

As will thus be seen, articles to be operated upon may be placed by the work-holders or magnetic chucks 18 as they pass along in succession and such objects are carried in turn to the grinding or polishing wheels, where in response to the control of the cam for governing contour, the objects are subjected to a grinding action of depth and form as thereby determined, the counter-balanced mounting of the grinding wheel assembly allowing readily of such movements as necessary; and finally in the further travel of the carrier, the articles are brought to a point of discharge where the operator may remove them and refill the work-holders. I

It will be understood that grinding wheels or polishing wheels can be used interchangeably in the assemblies here provided and in the claims hereinafter, such interchangeability and equivalency is contemplated in the expression grinding wheel,

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly'point out and dis- .tinctly claim as my invention e 1; In a machine of the character described, an electric motor and a grinding wheel, a floating frame therefor, means for compensating the weight of said frame and contents, means for adjusting the grinding wheel relative to said frame, and travelling work carrying means cooperating with said grinding wheel. r

2. In a machine of the character described,

3 an electric motor and a grinding wheel on the motor shaft, a floating frame therefor, means for compensating the weight of said frame and contents, means for ad usting the grinding-wheel relative to said frame, a control an attendant upon a grinding Wheel, a pivotally mounted frame for said grinding Wheel, a rotary table,'a control shoe carried by said frame to the centerward side of said grinding wheel, workcarrying chucks on said table in the path of said grinding Wheel, and means also on said table for actuating said control shoe.

5'. In a machine of the character described, an electric motor and a grinding Wheel on the motor shaft, a counterbalance, a pivotal mounting for said motor and grinding wheel, a control shoe carried with said grinding wheel, a rotary table, work-holding chucks on said table in the path of said grinding wheel, and means also on said table for actuating said control shoe.

6, In a machine of the character described, a plurality of grinding wheels, a pivotally mounted frame for each said wheel, a control shoe carried With each said grinding wheel, a

rotary table, work-holders on said table in I the path of said grinding wheels, and means also on said table in the path of said control shoes for actuating the same,

7. In a machine of the character described, a plurality of electric motors with a grinding wheel on each motor shaft, a counterbalance for each said motor and wheel, a pivotal mounting therefor, a control shoe carried with each said grinding wheel, a rotary table, Work-holders on said table, and projections also on said table for actuating said control shoes;

8. In a machine of the character described, a plurality of electric motors each with a grinding Wheel on the motor shaft, a pivotally mounted frame for each said grinding wheel, means for adjusting each grinding wheel in its frame, a control shoe carried with each said grinding Wheel, a rotary table, work-holders on said table in the path of said grinding wheels, and a series of projections on said table adjacent said work-holders and in the path of said control shoes.

9. In a machine of the character described, a plurality of electric motors each with a grinding wheel on the motor shaft, a pivotally mounted frame for each said grinding wheel, a counterbalance therefor, screwthreaded means for adjusting each grinding wheel in its frame, a control shoe carried.

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with each said grinding wheel, a rotary table, Work-holders on said table in the path of said grinding wheels, and a series of projections on said table in'the path of said control shoes 5 for actuating the same. 7

Signed by me this 9th day of April, 1926.

CHARLIE L. HAWES. 

